Bascule-bridge.



ZySgEETS-SHEET Patented Aug. 17, 1915.

J. B. STRAUSS. BASCULE BRIDGE.

APPLICATION FILED MAR. 9, 1908.

J. B. STRAUSS.

BASCULE BRIDGE.

APPLICATION FILED mm. 9. I908.

Patented Aug. 17, 1915.

2 SHEETS-SHEET 2.

which the followin I inascunnmm nq ,s aaataa ea tent.

s... i f 1.-- *appnaamnakn h 9.1. 8-.l i iam l a ai' To all w homtt ma concern: i

Be it known t at'I, J I earn B.'$'.r izauss,' a citizen of the'TUnited States,v res ding at improved bridge of this description My invention illustrated'in accom panying drawingsfvih'erein- 1i Flgure 1 1s a view of adouble leaf bridge embodying the invention; Fig. 2 is a" plan view of the trunnion end ofone of the moving leaves; Fig. 3 is a viewshowing one of the supporting devices forthe moving leaf; Fig. 4 is a view showing the box (girder of the counterweight; Fig. 5 is a view. showmg a modified construction; Fig. 6 a view showing the supporting device for the moving leaf shown in Fig. 5; Fi 7 is a sectional view taken on line '7 of Fig. 6;

Fig. 8 is a sectional view of a trunnion showing a modified construction; Fig. '9 is a sectional view taken on line 99 of F1g. 8; Fig. 10 is a sectional view through one of the trunnions'shown in Figs. land 5;

Fig. 11 is a detailview of the front sup port for the moving leaf.

' Like letters refer to like out the several figures.

In Fig. 1 I haveshown the 'movlng leaf 1- and a portion of the moving leaf '2'of a double leaf bascule bridge, the twomoving leaves being duplicates and swinging in opposite directions to open thebridge. The moving leaf 1 is supported upon trunnions 3 parts Lthrough located above the bridge floor and means 40' are provided for supporting both ends of the trunnions from sutpports located outside of the moving-lea As. herein shown there is provided at each side" of the moving leaf and outside thereof the supports A which form what may be termed A-frames,

two main members transmit ting the loads to the foundations, said members connected by bracing, at least one of each having said, members being inclined. -These supports are connected together by the supportlng cross piece 5 which ma be of any suitable construction and whic thetruss. members above the. roadway. T e

"trunnions 3 are located above the cross iece 5 and are supported at their outer en by the supports 4' and at their inner ends by space requiredfor it. By

'vided with side extensions passes throu h' tate "on them or .they maybe fixed to the: o

trusses and rotate inbearings on the supports-4 and 6. It will be noted in this con- 1 Patented Aug. '17. 1915.

structionthat oneend of each trunnion is supported directly upon the support 4, and the other indirectly. It will ben'oted that by this construction means is; rovided for supporting the inner ends of t etrunnions without, the necessity of spreading out) the trusses o'f the moving leaf as would be the case if an inside support were used, and

that therefore said trusses may be brought close together, and may, as it were, be on the clearance lin er the bridge, thus decreasing the cost of the bridge and the placing the trunnion supports. outside of the moving leaf and connecting them through the trusses it will be noted that the said supports infringe on neither the trusses nor the clearance lines. It will [further be seen that the supports for the overhead trunnions and the leaf mounted thereon clear each other during movement of the leaf. In this construction thetrusses of the leaf may themselves form the traflic clearance lines.

v j In Fig. l-the cross piece 5, which be trussesis built as a quadrilateral with the trunnionsupports at 1ts middle; the upper end of this quadrilateral isfsubdi'vided into.

a smaller quadrilateral-lying entirely above the cross piece, and th gentire Weight of the bridge when swinging is transmitted through this auxiliar quadrilateral 7 to the trunrilateral provides ample spacefor a horizontal girder 8 in connection with the cross p ece to take the lateral thrust on the trun- .;n1ons, and that all loadson the inside trunnion hearing are transmitted as before to the be noted that the main quadoutside supports and thence to the foundation. The bracing of both the trusses and I trunnion supports 1s uninterrupted and complete. The counterweight 9 is carried above the space between the trusses and is pro- 10 which inclose the girders 11 of the approach s an when the bridge is opened. Theflo'or of the moving leaf ends at a point substantially in thevertical plane of the trunnion and the floor of the approach span abuts the floorof the I moving leaf the floor of. the approached span coming between the extensions 10 on thecounterweight when the moving span is A front shoe or support 12 is located ahead of the trunnion support which shoe becomes the fulcrum when the bridge is closed, the live load ahead of this shoe being balanced by the dead load on the trunnion support. By properly spacing the two supports all uplift on the foundations can thus be avoided, the. span when open balancing about the trunmons and when closed about the shoe. The counterweight may be formed inany desired manner I prefer to form it of concrete or concrete-steel. As herein shown I prefer to provide a box girder 13 consisting of a series of horizontal and vertical girders having a series of projecting pieces, or extensions 14 and 15, the girders and pieces 14 and 15 being embedded in the concrete. I also prefer to provide a surrounding corrugated metal box 16. By means of this construction the weight of the counterweight is properly supported by the box girder and attached arts, and transferred through them to the trusses of the moving span when the bridge is in the closed and open position, the points where the strains come varying as theposition of the leaf varies.

In some constructions the moving leaf is so heavy that the pressure tends to squeeze out the oil. As herein shown I provide a means for properly oiling the trunnion bearings under such conditions- In this construction the trunnions 3 are 'made hollow, as shown in Fig. 10, there being holes or openings 17 connectin with t e hollow space 18 so that the oi may escape to the bearing surface. Some means-is provided for forcing oil under pressure into the bearing. As herein shown a pipe =19is connected with a pump 20 which may be operated in any desired manner, such as by a separate motor 21. It will be seen that by this means pressure enough will be supplied to force the oil into contact with the bearing surface,

this pressure being regulated as desired.

The moving leaves are operated in any desired'manner, as, for example, by means of the rack 25 and pinion 26, the mion being operatively connected with a suitable motor.

As shown in Fig. 5 the trunnions 3 are located in the top chord 22 of the moving leaf. In this construction the trunnion 3 has its inner end supported by a downwardly fproject'mg part 23 fastened to the cross trunnions,

piece or cross support 24. In this construction the trunnion supports run above the and the counterweight 27 is fiigiptally connected thereto by-means of a 28, said counterweight being pivotally connected at 29 with the tail on bridge. The bridge is operated by means of of the 1,15o,eae

the operating strut 30 connected to the to chord of the bridge, and having a rac which engages a pinion 31 connected with a suitable motor.

In Figs. 8 and 9 a. modified construction for movably supporting the span is shown. In this construction the trusses of the moving-leaf are mounted directly upon the cross piece 5, .there being a suitable bearing for this purpose. As herein shown a sleeve 32 is fastened thereto in any desired manner. A hearing face 33 is fastened to the cross piece, and-a loose sleeve 34 is located between them, the bearing faces being the engaging faces of this loose sleeve with the parts 32 and 33.

In the bascule bridge herein shown the supports for the outer ends of the trunnions are located outside of-the boundaries of the moving leaf, and there are means provided for transmitting ends of the trunnions to these outer supports, these means being located beyond the clearance. lines of the bridge. The front support 12 is preferably provided with a series of rollers 34 upon which the moving leaf rests when closed. These rollers permit longitudinal movement of the moving leaf due to expansion and contraction of the metal.

I claim:

1. A bridge comprising a moving leaf, trunnions upon which it 1s supported, said trunnions located above .the bridge floor, supports for the trunnions located on the outside of the leaf, and means for supporting both ends of the trunnions from these outside sup orts.

2. A bri ge comprising a movin leaf, trunnions upon which it is mounte said trunnions located above the bridge .floor, supports on the outside of the leaf upon which the outer ends of the trunnions are supported,.the inner ends of said trunnions being at one side of said supports, and means for supporting the inner ends of the trunnions upon the said outside supports.

30 A bridge comprising a moving leaf having trusses bounded by the traflie clearance lines, said trusses 'mounted on trunnions located above the bridge floor, and supports for said trunnions transmitting the load to the foundations entirely on the outside of the trussesflaid supports connected together independent of the leaf above the traflic clearance line and so as not to interfere with the movement of the leaf in opening or closing.

4. A bridge comprising a movin leaf, trunnions therefor, located above the ridge floor, supports for-said trunnions located outside the moving leaf, and a connecting member between said. supports and passing through the trusses.

5. bascule bridge comprising a moving the pressures on the inner leaf, trunnions therefor located above; the bridge floor, a support for oneend of each supports, supports for the'other' ends'ofsaid trunnions connecting the trunnions with said 'cross'piece1.

' 6. ,A'] bridge comprising a. i-mo ving j leaf,'-

pp ts ilo d u ide the; movi g af; a cross piece connectmg the sa d supportstogether'abovejthe clearance lines, trunnions upon which saidleaf is mounted, said nions scen d a sai pers a d r s plcce. I

'7. A bridge comprising a moving leaf,- ov'er-head trunnions upon which it is mounted, supports for said trunnions connected togetherfabove the "roadway,"and means for mounting the movingleaf thereon so that it will clear the supports and connection during its opening'and closing movement.

bridge comprising a moving leaf, over-headtrunnions upon which it is mounted, a trunnionsupportingdevice extending across the sfpace between the trusses of the movinglea and an'engaging' part on the trusses adapted-to engage said trunnions and to clear the trunnion'supporting'device when the moving leaf is operated.

9. A bridge comprising a moving leaf, trunnions upon which the leaf is mounted,

supports outside the boundary of said leaf for directly supporting the outer ends of said trunnions,'means separate from the leaf and common to both trunnions for transmitting the pressures on'the inner ends of said trunnions to the supports for the outer ends thereof. Y

10. A bridge comprising a' moving leaf, trunnions upon which the leaf is mounted, supports outside the boundary of said leaf for supporting the outer ends of said trunnions, means separate from .the leaf for transmitting'the pressures on the inner ends of said trunnions to the supports for the outer ends thereof, said m'eans located above the clearance lines of the bridge.

11. A bridge comprising a moving leaf, over-head trunnions upon which the leaf is mounted, supports outside the boundaries of said leaf for supporting the outer ends of said trunnions, means for transmitting the pressures on the inner ends of said trunnions to the supports for the outer ends thereof the trunnlons being simple beams with the load between the supports.

12. A bascule bridge comprising a moving leaf, over-head trunnions upon which it is mounted, supports for the outer ends of said trunnions, located exterior to the boundaries of the moving leaf, supports for the inner ends of said trunnions within the boundaries of the leaf, and a connection between said latter; supports.

'13. A bascule bridge comprising a moving leaf, upwardly projecting supports therefor,

a cross support connecting said supports above the roadway, and a trmmion connection for the moving leaf mounted upon said cross support. I 14. 'Abascule brid I leaf having throng trusses mounted on trunnions located in the top chord, trunnion supports for, said-trunnions exterior to the moving leaf, and supporting theouter ends thereof,'a cross connection between saidsupports located above the topchord of the thereon is transmitted to said, cross connection.

' 15. A bascule brid e comprising a moving leaf, trunnions therefor which carry the entire, dead load of the moving leaf when open,

a floor for the'moving leaf ending substantially in the vertical' plane of the trunnions,

so that the live load is all received on the moving leaf substantiallyin front of said trunnions, bearings for said trunnions, the

stresses upon said trunnion bearings due to the dead load being always downward, a fulcrum stop in the path of the moving leaf forming a permanent part of the structure in front of the trunnions whereby the dead load on the trunnions is utilized .to resist that portion of the live load on the moving leaf ahead of said fulcrum stop.

16. A bascule bridge comprising a moving leaf mounted on trunnions above the roadway, an A-frame support therefor comprisingtwo outside supports, a connecting member between said supports above the roade comprising a moving trusses, supports for the inner ends of said 'trurmions by means of which the pressure way extending across the roadway, and re-..

sisting the vertical forces when the bridge is closed, and the vertical and horizontal forces when the bridge is open. I

17. A bascule bridge comprising a moving leaf, a supporting device therefor com rising a trunnion and a roller support in f moving leaf and embedded in said concrete,

said casing connected, with said embedded girders and acting to protect the concrete.

19. A bascule bridge comprising a moving leaf, a concrete counterweight extending across the space between the trusses, a series of cross girders embedded in said counterweight, and extensions connected with said girders for supporting the counterweight upon the girders.

ront thereof engaged by the moving leaf when 20. A bascule bridge comprisin a moving leaf, a counterweight connected t ereto and extending across the space between the trusses, said counterweight provided with side extensions adapted to pass by and between adjacent sections of the approach floor when the moving leaf is open.

21. A bascule bridge comprising a moving leaf, trusses forming part of said leaf, a counterweight comprising a resisting device made up of a series of girders in addition to the trusses of the moving leaf with which nitoeee the counterweight is used, concrete surrounding said girders and in which they are embedded, the girders forming a resisting device for the counterweight load in all the various positions of the counterweight and transferringthe' efiect of said-counterweight to the trusses of the moving leaf.

WALTER EYERS, EDNA K. REYNOLDS. 

